Marine engine



(No Model.) 2 Sheets- Sheet 1.

J, T. CASB. MENINE ENGINE.

Hill (No Model.) 2 Sheets-Sheet 2.

-J.` T. CASE.

MARINE ENGINE.

No. 430,067. Patented June 10, 1890.

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MME/75555, //7 vea/mz ATENT EEICE.

JOEL T. CASE, or BRISTOL, CONNECTICUT.

MARINE ENGINE.

SPECIFICATION forming part of Letters Patent No. 430,067', dated J' une 10, 1890.

Application filed October 3i), 1889. Serial No. 328,626. (No model.) i

To a/ZZ whom it nur/y concern:-

Be it known that I, JOEL T. OASE, a citizen of the United States, residing at Bristol, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Marine Engines, of which the following is a specilication.

My invention relates to improvements in marine or reversible engines, and the main object of my invention is to provide a cheap and efficient reversing-valve.

In the accompanying drawings, Figure 1 is a front elevation of my engine. Fig. 2 is a vertical section of the same on line @c a; ot Fig. 1. Fig. 3 is an enlarged horizontal section of the same on line y y of Fig. 1, looking at the upper part. Fig. 4 is a vertical section of the same on line e' zof Fig. 3. Fig. 5 is avertical section of the same on line fw w of Fig. 3, and Fig. 6 is a vertical section on the line fu o of Fig. 1.

A designates the case or frame, on which is mounted the crank-shaft B, in suitable bearings to the crank 7 of which the piston-rod 8 is connected. The piston 9 and its cylinder 10 oscillate with the crank shaft substantially as in Patent No. 394,67 5, granted to me December 18, 1888. Within the case, upon each side of the cylinder, there is a steamchest 11, having ports 12,leading to thelower end of the cylinder, and ports 13, Fig. 2, leading to the upper end of the cylinder. These steam-chests 11 11 are each provided with a lateral passage 14, that leads to the reversing box or plate C. This boXis provided with two chambers 15 l5, having side passage-ways 16 16, that lead to the passage-ways 14 into the respective steam-chests, and a top and bottom chamber 17 and 18, the former for the admission of live steam supplied through the conduit 19 and the latter for exhaust-steam es-l caping through the conduit 20. The central portion of the reversing-box is covered by a cap 21, the edges of which are notched, as at 22, Fig. 1, for engagement of the latch 23 on the valve-handle 24. In the center of the reversing-box is a cylindrical chamber, in which I mount the cylindrical reversing-valve 25. This valve is provided with a shaft or spindle 2G, to the outer end of which the handle 241- is attached. Two sides of the reversing-valve are slabbed off, as shown, leaving two side passage-Ways 27 between its cylindrical ends.

In the drawings, the latch 23 of the yvalvehandle 24: is resting in the middle one of the notches 22 in the cap 21, whereby thesolid portion of the valve completely closes both of the chambers 17 and 18. It desired to let steam into the left-hand steam-chest, viewing the engine as in Figs. 2 and 5, the valve-handle is lowered and stopped with its dog or latch in the lowermost notch in the cap, thereby bringing the solid portion of the valve in alignment with the division-walls at the righthand side of the live-steam chamber and lefthand side of the exhaust-chamber, as shown in Fig. 6. The live steam will then pass from the chamber 17 in the reversing-box through one side passage 27 in the reversing-valve to the chamber 15 vand passage-way 14. to the left-hand one of the steam-chests 11 for supplying the engine,' and the cylinder will eX- haust into the right-hand one of the steamchests 11 and tlow out through the exhaustpipe, all as indicated in Fig. 6. By lifting the valve-handle and dropping its latch into the upper notch the solid portion of the reversingvalve -is brought into the position indicated by broken lines in Fig. G, and the live steam is thrown to the steam-chest upon the right-hand side and the motion of the engine is reversed, the left-hand steam-chest then becoming the exhaust side. The three positions thus described for the reversing-valve are for cutting off all the steam and for giving a full opening in driving the engine in either direction. If desired` notches may be made intermediate those for these three positions, so as to stop the reversing-valve with the passages partially open in driving the engine in either direction.

In order to avoid chaing and an unequal expansion of parts when iirst starting the engine after it has remained idle long enough to get cool, I make a passage-way, as indicated by broken lines at 28, Fig. 2, that leads from the steam-chest upon one side to that upon the other, and in one end of said passage-Way I place the valve 29, for opening and closing it when desired. Before starting the engine this valve is opened, and the steam turned on and allowed to blow through the exhaust-passage,

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thereby Warming up both sides of the engine. This valve is then closed and the engine started in the usual manner, which it will do Without chaiing.

I claim as my invention-- 1. The combination of an engine Ahaving steam-chests upon opposite sides and lateral passages 14, the reversing-box C, having` central cylindrical chamber, live and exhaust steam chambers 17 and 18, chambers 15 15, and side passage-Ways 16 1G, leading therefrom to said lateral passage-Ways 14, and the reversing-valve 25 Within said reversing-box, substantially as described, and for the purpose specified.

2. The combination of an engine having steam-chambers upon tWo sid es, the reversingbox havingr live and exhaust chambers on 

